Google fixes an Android Lollipop lockscreen bypass bug – how bad was it?

The exploit worked by entering an extremely long string of characters into the password field while the camera is open, causing the device to crash and return to the homescreen.

Android Lollipop 5.1 brings promised anti-theft “kill switch”

Android Lollipop 5.1 is out for some Nexus phones, and it comes with an anti-theft kill switch. Now you can use Android Device Protection to freeze your phone if it’s lost or stolen.